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Standardize LSN formatting by zero padding

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This commit standardizes the output format for LSNs to ensure consistent
representation across various tools and messages.  Previously, LSNs were
inconsistently printed as `%X/%X` in some contexts, while others used
zero-padding.  This often led to confusion when comparing.

To address this, the LSN format is now uniformly set to `%X/%08X`,
ensuring the lower 32-bit part is always zero-padded to eight
hexadecimal digits.

Author: Japin Li <japinli@hotmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Discussion: https://postgr.es/m/ME0P300MB0445CA53CA0E4B8C1879AF84B641A@ME0P300MB0445.AUSP300.PROD.OUTLOOK.COM
This commit is contained in:
Álvaro Herrera
2025-07-07 13:57:43 +02:00
parent 62a17a9283
commit 2633dae2e4
67 changed files with 681 additions and 681 deletions
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6
src/backend/access/rmgrdesc/xlogdesc.c
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@@ -65,7 +65,7 @@ xlog_desc(StringInfo buf, XLogReaderState *record)
{
CheckPoint *checkpoint = (CheckPoint *) rec;
appendStringInfo(buf, "redo %X/%X; "
appendStringInfo(buf, "redo %X/%08X; "
"tli %u; prev tli %u; fpw %s; wal_level %s; xid %u:%u; oid %u; multi %u; offset %u; "
"oldest xid %u in DB %u; oldest multi %u in DB %u; "
"oldest/newest commit timestamp xid: %u/%u; "
@@ -111,7 +111,7 @@ xlog_desc(StringInfo buf, XLogReaderState *record)
XLogRecPtr startpoint;
memcpy(&startpoint, rec, sizeof(XLogRecPtr));
appendStringInfo(buf, "%X/%X", LSN_FORMAT_ARGS(startpoint));
appendStringInfo(buf, "%X/%08X", LSN_FORMAT_ARGS(startpoint));
}
else if (info == XLOG_PARAMETER_CHANGE)
{
@@ -156,7 +156,7 @@ xlog_desc(StringInfo buf, XLogReaderState *record)
xl_overwrite_contrecord xlrec;
memcpy(&xlrec, rec, sizeof(xl_overwrite_contrecord));
appendStringInfo(buf, "lsn %X/%X; time %s",
appendStringInfo(buf, "lsn %X/%08X; time %s",
LSN_FORMAT_ARGS(xlrec.overwritten_lsn),
timestamptz_to_str(xlrec.overwrite_time));
}